Maintenance and debugging of pneumatic butterfly valve

by:Lianke Valve     2022-08-09
1. Cylinder inspection and maintenance plan Clean the surface of the cylinder and refuel at the circlip of the cylinder shaft. Regularly open the end cover of the cylinder every 6 months to check whether there is debris and moisture in the cylinder, as well as the state of grease. If the grease is missing or dry, the cylinder should be disassembled for comprehensive maintenance and cleaning, and then the grease should be added. 2. Check the valve body every 6 months to check whether the appearance of the valve body is good, whether the installation flange is leaking, if it is convenient to check whether the valve body is well sealed, there is no wear, and whether the valve plate runs flexibly, and whether the valve is stuck with foreign objects. Cylinder block disassembly and assembly methods and precautions: first disassemble the cylinder from the valve body, first disassemble the cylinder end caps, pay attention to the direction of the piston rack when disassembling the piston, and then use external force to rotate the cylinder shaft clockwise to make it. The piston runs to the outermost side, and then slowly ventilate the closing valve hole. Use air pressure to gently push the piston out, but this method must pay attention to slowly ventilating, otherwise the piston will suddenly spray out, which is a little dangerous! Then put the circlip on the cylinder shaft. Remove it, and the cylinder shaft can be taken out from the other end. Then each part can be cleaned and greased. The parts that need to be greased are: the inner wall of the cylinder and the piston sealing ring, the rack and the back ring, as well as the gear shaft and the sealing ring. After the grease is added, it must be installed in the reverse order of disassembly and parts. After installation, it must be installed in the reverse order of disassembly and parts. Be sure to pay attention to the position of the rack and pinion. Be sure to ensure that the piston is retracted when the valve is opened. In the innermost position, the upper end groove of the gear shaft is parallel to the cylinder block. When the valve is closed, that is, when the piston extends to the outermost position, the upper end groove of the gear shaft is perpendicular to the cylinder block. Installation and debugging methods and precautions of the cylinder and the valve body: first put the valve in the closed state with external force, first put the valve in the closed state with external force, that is, rotate the valve shaft clockwise until the valve plate is in sealing contact with the valve seat, and at the same time, the cylinder is also in the closed state. Put the valve in the closed state (that is, the small groove above the cylinder shaft is perpendicular to the cylinder body, and the valve is closed by clockwise rotation), and then install the cylinder on the valve (the installation direction can be parallel or perpendicular to the valve body), and then Check whether the screw holes are aligned, there will not be too much deviation, if there is a little deviation, just turn the cylinder block a little, and then tighten the screws. When debugging a pneumatic butterfly valve, first check whether the valve accessories are fully installed, such as solenoid valve and muffler. At the first debugging operation, use the manual operation of the solenoid valve manual button (the solenoid valve coil is de-energized during manual operation, and the manual operation is valid; when the electric control operation is performed, place the manual twist on the 0-position ring to lose power, and the manual operation is valid; 0-position In order to close the valve, the 1st position is to open the valve, that is, the valve will be opened when the power is turned on, and the valve will be closed when the power is turned off. If the valve needs to be turned off, the open position of the power-off is the valve, and the solenoid valve coil can be rotated 180 degrees to install), and observe the operation of the valve. state. If it is found in the process of commissioning and operation that the pneumatic butterfly valve manufacturer is very slow at the starting position of the valve opening, but it is very fast as long as it moves. Fast, in this case, the valve is closed too tightly, just adjust the stroke of the cylinder a little (adjust the stroke adjustment screws at both ends of the cylinder a little bit inward at the same time, when adjusting, you need to run the valve to the open position, and then turn off the air source. Drop and adjust again), adjust until the valve opens easily and closes in place without leakage. If the muffler is adjustable, the opening and closing speed of the valve can be adjusted, and the muffler needs to be adjusted to a suitable opening for the opening and closing speed of the valve. If the adjustment is too small, the valve may not move.
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